Remove overzealous check from %OptimizeFunctionOnNextCall.

test/mjsunit/compiler/opt-next-call.js

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --allow-natives-syntax
 
 function foo() {
   return "fooed";
 }
 
 %OptimizeFunctionOnNextCall(foo);
 assertEquals("fooed", foo());
 assertOptimized(foo);
+
+function bar() {
+  return "bared";
+}
+
+assertEquals("bared", bar());
+%OptimizeFunctionOnNextCall(bar);
+assertEquals("bared", bar());
+assertOptimized(bar);